Quick Start Guide

By default, mode shift is assigned to the button on top of the mouse. Use the Logitech Options
Software, to disable SmartShift if you prefer to stay in a single scrolling mode and shift manually. You
can also adjust the SmartShift sensitivity, which will change the speed required to automatically shift
into free spinning.
Thumb wheel
Scroll side to side effortlessly with a stroke of your thumb.
Install Logitech Options software to extend thumb wheel capabilities:
Adjust thumbwheel scrolling speed, and direction
Enable app-specific settings for the thumbwheel:
Zoom in Microsoft Word and PowerPoint
Adjust brush size in Adobe Photoshop